Outdoor Power Equipment worked example

Noise Compliance Load with noise test cell load of 23 kW: a worked example

Push noise test cell load up to 23 kW and the picture changes. This example computes every intermediate figure at that operating point. a compliance or test team needs the energy cost of sound-power testing to budget it across units tested

The inputs for this scenario

  • Noise test cell load: 23 kW (raised for this scenario; the documented default is 9)
  • Sound test hours: 6 hr (unchanged)
  • Blended electricity rate: 0.12 $ / kWh (unchanged)
  • Units sound-tested: 400 units (unchanged)

Working through the calculation

  • Applying the documented formula (Total noise test energy cost = noise test cell load × sound test hours × blended electricity rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 138 kWh for noise test energy used, the number this scenario is built around.
  • At this operating point the engine returns 16.56 $ for total noise test energy cost.
  • At this operating point the engine returns 0.04 $ / piece for noise test energy cost per unit.
  • At this operating point the engine returns 2.76 $ / hr for hourly noise test energy cost.

How this compares with the baseline

  • Against the tool's baseline example, where noise test cell load sits at 9 kW and the headline result is 54 kWh, this scenario comes in 156% above the baseline at 138 kWh.
  • It computes the kWh consumed by a noise-test cell, the total electricity cost, and how that cost spreads across each unit sound-tested. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Noise test energy used: 138 kWh (headline result)
  • Total noise test energy cost: 16.56 $
  • Noise test energy cost per unit: 0.04 $ / piece
  • Hourly noise test energy cost: 2.76 $ / hr

Run it with your numbers

  • Every input above is editable in the live Noise Compliance Load calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.